Engine starting issues....

I have a 2003 Mobius LSV and am having issues with the engine starting after its has been running awhile.

The boat ran fine all morning and I pulled into a cove to hang out for awhile. When I got ready to leave the boat would not start. I felt of the engine and it was very hot for sitting around not running for at least 3 hours. This morning I stopped by the marina and out of curiosity I decided to start the boat. It started right up with no problems when it was cold. I thought this was a battery issue at first, then I thought it may be an issue with my alternator not charging. Then I thought it must be the starter...

I haven't noticed the temperature gauge running hot....

Any ideas on what could be causing this? It appears the engine is refusing to start after it has heated up...

Could be getting vapor lock, won't start until it cools down.